620145885 has 16 divisors (see below), whose sum is σ = 993450240. Its totient is φ = 330338880.

The previous prime is 620145881. The next prime is 620145893. The reversal of 620145885 is 588541026.

It is not a de Polignac number, because 620145885 - 2² = 620145881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620145881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12501 + ... + 37370.

It is an arithmetic number, because the mean of its divisors is an integer number (62090640).

Almost surely, 2^620145885 is an apocalyptic number.

It is an amenable number.

620145885 is a deficient number, since it is larger than the sum of its proper divisors (373304355).

620145885 is a wasteful number, since it uses less digits than its factorization.

620145885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50708.

The product of its (nonzero) digits is 76800, while the sum is 39.

The square root of 620145885 is about 24902.7284649695. The cubic root of 620145885 is about 852.7687728771.

The spelling of 620145885 in words is "six hundred twenty million, one hundred forty-five thousand, eight hundred eighty-five".